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You just have to get it compounded for you in a wet compounding pharmacy (usually privately owned, not corporate)
AHK-Cu and GHK-Cu differ by only one amino acid
Active Ingredient: Cyanocobalamin, a synthetic form of vitamin B12
18 Prevention Because of potential interactions from prolonged medication use, physicians should consider screening patients for vitamin B 12 deficiency if they have been taking proton pump inhibitors or H 2 blockers for more than 12 months, or metformin for more than four months
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